Updated A Plugin Now Content Is Misbehaving

I am the webmaster for the site MSDLawAZ.com. Recently, I updated a plugin of my site QTranslate and now content on my Blogs page won’t load anymore. Here’s the link to the page http://msdlawaz.com/?page_id=16

I now see the following error: Catchable fatal error: Object of class WP_Post could not be converted to string in /home/content/82/9493782/html/wp-content/plugins/qtranslate/qtranslate_core.php on line 455

Unfortunately, I cannot locate a earlier backup from which to restore the core.php file. I have the contents of the existing core.php file though if it helps. Any ideas on how to resolve this?